Re: [HACKERS] Trivial HugeTLB Benchmark

2007-03-06 Thread Ryan Cumming
On Sun, 2007-03-04 at 10:14 -0800, Tom Lane wrote: > If you did this only once, the results are not really trustworthy; > you need to average several similar runs before you can have much > confidence. pgbench's inter-run variation is usually upwards of 10%, > so trying to draw conclusions about h

[HACKERS] Trivial HugeTLB Benchmark

2007-03-04 Thread Ryan Cumming
Hey, Out of curiosity I benchmarked PostgreSQL 8.2.3 using huge pages for shared memory. Oracle claims fairly significant speedups with huge pages but I couldn't find any information on PostgreSQL. I used the attached patch to enable huge pages on Linux. The test hardware is a dual Nocona Xeon